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Finding the Fourth Proportional to 314,898.40, 472,405.20 and 127,928.80

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Solution

The fourth proportional to 314,898.40, 472,405.20 and 127,928.80 is: 191,916.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    314,898.40 : 472,405.20 = 127,928.80 : x
  2. Step 2: Convert to fraction form
    314,898.40/472,405.20 = 127,928.80/x
  3. Step 3: Cross multiply
    314,898.40x = 472,405.20 × 127,928.80
  4. Step 4: Simplify right side
    314,898.40x = 60,434,230,349.76
  5. Step 5: Solve for x
    x = 60,434,230,349.76/314,898.40
  6. Step 6: Final answer
    x = 191,916.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.